| #if defined(__loongarch_lp64) && defined(__linux__) |
| |
| #include "sanitizer_common/sanitizer_asm.h" |
| |
| ASM_HIDDEN(COMMON_INTERCEPTOR_SPILL_AREA) |
| ASM_HIDDEN(_ZN14__interception10real_vforkE) |
| |
| .text |
| .globl ASM_WRAPPER_NAME(vfork) |
| ASM_TYPE_FUNCTION(ASM_WRAPPER_NAME(vfork)) |
| ASM_WRAPPER_NAME(vfork): |
| // Save ra in the off-stack spill area. |
| // allocate space on stack |
| addi.d $sp, $sp, -16 |
| // store $ra value |
| st.d $ra, $sp, 8 |
| bl COMMON_INTERCEPTOR_SPILL_AREA |
| // restore previous values from stack |
| ld.d $ra, $sp, 8 |
| // adjust stack |
| addi.d $sp, $sp, 16 |
| // store $ra by $a0 |
| st.d $ra, $a0, 0 |
| |
| // Call real vfork. This may return twice. User code that runs between the first and the second return |
| // may clobber the stack frame of the interceptor; that's why it does not have a frame. |
| la.local $a0, _ZN14__interception10real_vforkE |
| ld.d $a0, $a0, 0 |
| jirl $ra, $a0, 0 |
| |
| // adjust stack |
| addi.d $sp, $sp, -16 |
| // store $a0 by adjusted stack |
| st.d $a0, $sp, 8 |
| // jump to exit label if $a0 is 0 |
| beqz $a0, .L_exit |
| |
| // $a0 != 0 => parent process. Clear stack shadow. |
| // put old $sp to $a0 |
| addi.d $a0, $sp, 16 |
| bl %plt(COMMON_INTERCEPTOR_HANDLE_VFORK) |
| |
| .L_exit: |
| // Restore $ra |
| bl COMMON_INTERCEPTOR_SPILL_AREA |
| ld.d $ra, $a0, 0 |
| // load value by stack |
| ld.d $a0, $sp, 8 |
| // adjust stack |
| addi.d $sp, $sp, 16 |
| jr $ra |
| ASM_SIZE(vfork) |
| |
| .weak vfork |
| .set vfork, ASM_WRAPPER_NAME(vfork) |
| |
| #endif |
